JP6850536B2 - Support members, support legs and floor structure - Google Patents

Description

The present invention relates to a floor-standing floor structure and supporting members that support the floor of an indoor sports facility.

Indoor sports facilities such as gymnasiums and multipurpose halls generally employ a double-floor structure in which floor panels, plywood, and floor finishing materials are installed on multiple support legs installed on a floor base such as a concrete slab. ing.

In such a double-floor structure, in order to ensure the performance of the floor when exercising, as specified in JIS A 6519 "Steel floor base component for gymnasium", vertical load deflection, repeated impact performance, and elasticity. It is necessary to satisfy predetermined conditions such as sex (see, for example, Patent Document 1). Above all, elasticity is an index such as ease of exercise or difficulty in causing injury, so it is especially important to satisfy the condition of elasticity in order to improve exercise suitability and safety of the floor. Is.

Elasticity is defined by three items: elasticity value Y, cushioning effect value U, and vibration damping time _{TVD. In} order for the floor used in indoor sports facilities to satisfy the elasticity condition. , It is necessary to satisfy each of these items. Incidentally, elasticity value Y, _{"1.3782-0.0016 × (U F -1.1 × D} R × D R / T R -17.25) 2 -0.0028 × (D R × D R / _T R ^-24.28) is represented by ² ", cushioning effect value U is represented by" _{U F -1.1 × D R × D} R / T R ", _{U F} is the maximum deformation of the floor It is the deformation energy of the floor until it reaches.

Therefore, in order to satisfy the condition of the elasticity of the floor, for example, the interval between the support legs and the interval between the large pulls are adjusted within predetermined ranges, and the buffer effect value U, which is one of the items of elasticity, is predetermined. (For example, a method for constructing a floor structure in which the elasticity of the floor surface is made more uniform and the hardness of the floor surface is adjusted to be within a safe range is disclosed. See Patent Document 2).

Japanese Unexamined Patent Publication No. 08-246642 Japanese Unexamined Patent Publication No. 08-109735

As described above, the elasticity of the floor is defined by three items: the elasticity value Y, the cushioning effect value U, and the vibration damping time _TVD. Improving these values is the elasticity of the floor. It is important to improve the sex. However, with the conventional method, the cushioning effect value U of the floor can be improved, but the elasticity value Y of the floor cannot be improved. This, by increasing the buffering effect value U, the second term of the equation for calculating the elasticity value Y _{"-0.0016 × (U F -1.1 × D} R × D R / T R -17.25 ) Since ^{the value of "2} " becomes large, it is conceivable that the value to be subtracted from the ideal value (1.3782) of the elasticity value Y becomes large and the value of the elasticity value Y becomes small. Therefore, it can be said that the conventional method could improve the cushioning effect value U of the floor, but could not improve the elasticity value Y.

In the future, in order to construct a floor structure that is easier to exercise and considers safety, not only the cushioning effect value U of the floor but also the elasticity value Y is improved, and a floor structure with further improved elasticity is desired. There is.

Therefore, the present invention has been made in view of the above, and an object of the present invention is to provide a floor structure and a support member capable of having excellent elasticity.

In order to solve the above-mentioned problems, the floor-standing floor structure according to the present invention includes a plurality of support legs arranged on the floor base and a floor material laid on the support legs. Therefore, using the elasticity measuring device specified in JIS A 6519, a weight having a mass of 5 kg is freely dropped from a height of 0.8 m above the floor surface of the floor structure to collide with the floor surface. when an impact is applied to the floor surface, a waveform illustrating the time course of the displacement of the vibration occurring in the floor surface, with its maximum amplitude D _R is 0.30～0.70Cm, time of maximum amplitude D _R half period _{T R} of the apparent in a is from 0.015 to 0.040 seconds, the maximum amplitude _D half period relative to _{R T R} small shape, the floor structure, the floor up to the deformation of the bed reaches a maximum the maximum deformation energy _{U F} structure, which has a range of 25.00 to 66.70, represented the maximum amplitude _{D R,} and the maximum amplitude _D half period of apparent at the time of _{R T R,} of the floor structure rebound effect value a: _D the _R × _{D R} / _{T R,} has a range of 4.0 to 24.28, represented the maximum deformation energy _{U F} and repulsion effect value a of the floor structure, the floor structure buffering effect value _{U: U} F -1.1 × a is a 17.25 to 40, and resilient value _{Y: 1.3782-0.0016 × (U F -1.1} × a-17. ^{25) 2 -0.0028 × (a-} 24.28) 2 , characterized in that a 0.20 to 1.3782.

_{In the present invention, it is preferable that the damping time TVD} required for the amplitude of the vibration of the floor to be attenuated to 0.2 mm is 0.45 seconds or less.

In the present invention, the elasticity value Y is preferably an average value of values measured at a plurality of positions on the floor surface.

In the present invention, the difference between the maximum value and the minimum value of the elasticity value Y measured at a plurality of positions on the floor surface is preferably 0.20 or less.

In the present invention, the support leg includes a support member installed on the floor base and support bolts erected on the support member, and the support member supports the floor material. It is provided with an elastic portion having a tubular first elastic body arranged between the bolt and the floor base and a second elastic body provided in parallel inside or outside the first elastic body. It becomes.

In the present invention, it is preferable that the first elastic body is formed by using natural rubber, synthetic rubber, or synthetic resin.

In the present invention, it is preferable that the second elastic body is formed of a metal coil spring.

In the present invention, the support member further includes a female screw portion including an insertion portion to which the lower end portion of the support bolt is fixed and a flange portion extending from the side surface of the insertion portion. Therefore, it is preferable that the flange portion is supported by the first elastic body and the second elastic body.

In the present invention, the first elastic body is provided with an fitting portion into which the end portion of the flange portion is fitted around an installation surface in contact with the lower end surface of the flange portion, and the end portion of the flange portion is formed. It is preferable that the first elastic body is fixed in a state of being fitted into the fitting portion.

In the present invention, the first elastic body may further include an extension portion formed on the inner or outer bottom portion, and the second elastic body may be arranged on the extension portion. preferable.

In the present invention, when the spring constant of the first elastic body is 1.0, the spring constant of the second elastic body is preferably 0.50 to 1.5.

In the present invention, the logarithmic decrement of the vibration of the first elastic body is 0.3 to 0.5, and the logarithmic decrement of the vibration of the second elastic body is larger than 0 and 0.1 or less. Is preferable.

In the present invention, it is preferable that the floor material includes a floor base material laid on the upper part of the support legs and a floor finishing material laid on the upper surface of the floor base material.

In the present invention, the floor material may further include a waste plate between the floor base material and the floor finishing material.

The support member according to the present invention is a support member used in a floor-standing floor structure including a plurality of support legs arranged on a floor base and a floor material laid on the support legs. The support member is provided in parallel with a tubular first elastic body arranged between a support bolt for supporting the floor material and the floor base, and inside or outside the first elastic body. It is characterized by having an elastic portion having two elastic bodies.

According to the present invention, the elasticity value Y of the floor structure can be improved, and the cushioning effect value U of the floor structure can be maintained within a predetermined range, so that the floor structure can have excellent elasticity. ..

It is a perspective view explaining the structure of the floor-standing type floor structure by embodiment of this invention. It is a front view which shows the structure of the floor-standing type floor structure by embodiment of this invention simply. It is an exploded perspective view of a support leg. It is a notch figure explaining the structure of a support member. It is sectional drawing which shows the structure of the support member. It is a figure which shows an example of the radial change of the displacement of a floor. It is a figure which shows the relationship with the repulsion effect value A, the buffer effect value U, and the elasticity value Y. It is a figure which shows an example of another structure of a support member. It is a figure which shows an example of another structure of a support member. It is a figure which shows an example of another structure of a support member. It is a figure which shows an example of another structure of a support member. It is a figure which shows the measurement point. It is a figure which shows the measurement result of the elasticity value Y of a test body. It is a figure which shows the measurement result of the buffering effect value U of a test body.

Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the drawings. The present invention is not limited to the following embodiments. In addition, the components in the following embodiments include those that can be easily assumed by those skilled in the art and those that are substantially the same. Further, the components disclosed in the following embodiments can be appropriately combined. Further, for convenience of explanation of the floor structure and the like, in the example shown below, the explanation is given together with the figure in which the floor base is arranged below, but the present invention is not necessarily used in this arrangement. In the following description, the direction in which the floor finishing material is provided may be referred to as upward or upward, and the direction of the floor base may be referred to as downward or downward.

<Floor structure>
The floor-standing floor structure according to the embodiment of the present invention will be described. FIG. 1 is a perspective view for explaining the configuration of the floor-standing floor structure according to the embodiment of the present invention, and FIG. 2 is a front view simply showing the configuration of the floor-standing floor structure according to the embodiment of the present invention. As shown in FIGS. 1 and 2, the floor-standing floor structure (hereinafter, simply referred to as a floor structure) 10 has a support leg 11 and a floor material 12.

The support legs 11 are erected on the floor slab (floor base) 13 as a foundation surface. A plurality of support legs 11 are arranged on the floor slab 13 at predetermined intervals to support the floor material 12. The support legs 11 are a support member 21 installed on the floor slab 13, an adjustment bolt (support bolt) 22 rotatably erected on the support member 21 to support the floor material 12, and an upper end portion of the adjustment bolt 22. It is provided with an adjusting nut 23 screwed into (indoor side). As shown in FIG. 3, the support leg 11 is configured such that the support member 21, the adjustment bolt 22, and the adjustment nut 23 are separable.

(Support member)
An example of the configuration of the support member 21 will be described. FIG. 4 is a notch view for explaining the configuration of the support member 21, and FIG. 5 is a cross-sectional view showing the configuration of the support member 21. As shown in FIGS. 4 and 5, the support member 21 includes an elastic portion 3 1 and a female thread portion 32 of the bracket for fixing the lower end of the adjustment bolt 22.

The elastic portion 31 is a first elastic body having a conical outer peripheral surface, an internal hole penetrating from the floor slab 13 side toward the adjustment bolt 22 side in the vertical direction, and a cavity formed inside. 33A and a second elastic body 34 provided inside the first elastic body 33A along the inner peripheral wall surface of the first elastic body 33A are provided.

The first elastic body 33A is installed on the floor slab 13. The first elastic body 33A is fitted so that the end portion of the flange portion 39 is fitted around the extension portion 35 formed on the inner bottom portion and the installation surface (upper surface) in contact with the lower end surface of the flange portion 39 of the female screw portion 32. It has a portion 36. The end portion of the flange portion 39 is fixed to the first elastic body 33A in a state of being fitted into the fitting portion 36.

The first elastic body 33A is made of an elastic material such as natural rubber, synthetic rubber, or synthetic resin. Since the first elastic body 33A is made of the elastic material as described above, even if an impact is applied to the floor and vibration is generated, the damping of the vibration of the floor can be accelerated.

Further, the elastic portion 31 is formed in a cylindrical shape using the elastic material as described above, and has a cavity inside. Therefore, when an impact is applied to the floor and transmitted to the support legs 11 via the floor material 12, the elastic portion 31 is easily deformed, so that the maximum amplitude DR of the vibration of the floor, which will be described later, can be increased.

Further, in the first elastic body 33A, a metal washer 37 is provided on the extending portion 35, the second elastic body 34 is installed on the washer 37, and the upper end portion of the second elastic body 34 is on the flange portion 39. It is in contact. End of the flange portion 39, because it is fixed in a state of being fitted into the fitting portion 36, the elastic portion 3 1, the flange portion 39 stably on the first elastic member 33A and the second elastic member 34 disposed can do. Therefore, the elastic part 3 1, when manufacturing the supporting member 21, together with the second elastic member 34 may be previously allowed to set up in the first elastic body 33A, the first elastic member 33A and the flange portion 39 and the 2 It can be stably installed on the elastic body 34. As a result, it is possible to prevent the second elastic body 34 from separating from the first elastic body 33A at the time of manufacturing the floor structure 10, and also prevent the second elastic body 34 from coming into contact with the floor slab 13 and being damaged. It can be suppressed.

The second elastic body 34 is formed of an elastic body of a type different from that of the first elastic body 33A, and can be formed of, for example, a spring member such as a metal coil spring. As the material of the metal coil spring, for example, a piano wire, a hard steel wire, a stainless steel wire, an oil tempered wire, or the like can be used. When the impact is applied to the floor, when the impact is transmitted to the support legs 11 via the floor material 12, the elastic portion 31 is deformed to absorb the impact and try to restore it. At that time, although the first elastic body 33A uses an elastic material such as rubber or synthetic resin, it has a characteristic of having an internal loss of the viscoelastic body, so that the repulsive force against the impact applied to the floor is not sufficient. However, since the second elastic body 34 is incorporated inside the first elastic body 33A, the elastic portion 31 has a repulsive force and repulsion against the impact applied to the floor, as compared with the case where the elastic portion is formed only of rubber. Increase speed. Therefore, compared with the case where the elastic portion is formed like only rubber, elastic part 3 1, as well as increasing the maximum amplitude DR of vibration of the floor which will be described later, to reduce the half period TR apparent at maximum amplitude DR ..

When the spring constant k1 of the first elastic body 33A is 1.0, the spring constant k2 of the second elastic body 34 is preferably 0.50 to 1.5, more preferably 0.7 to 1.3. Is. If the spring constant k2 (k2 / k1) of the second elastic body 34 is less than 0.50 with respect to the spring constant k1 of the first elastic body 33A, the spring constant k2 of the second elastic body 34 is too small, so that an impact is applied to the floor. At that time, the repulsive force and the repulsive speed against the impact applied to the floor cannot be sufficiently obtained. Therefore, it is impossible to increase the maximum amplitude D _R of the vibration of the floor which will be described later, the maximum amplitude D half period of apparent _R T _R also can not be reduced. Further, when k2 / k1 exceeds 1.5, the spring constant k2 of the second elastic body 34 is too large, so that when an impact is applied to the floor, the repulsive force against the impact applied to the floor becomes too large. Therefore, the damping of the vibration generated on the floor is slowed down, which is not preferable. In the present specification, the spring constant is the force applied to the first elastic body 33A or the second elastic body 34 when a force is applied to the first elastic body 33A or the second elastic body 34, and the first elasticity. It is a ratio to the amount of change of the body 33A or the second elastic body 34, and the larger the value of the spring constant, the harder the elastic body, and the repulsive force and the repulsive speed are increased.

The logarithmic decrement of vibration of the first elastic body 33A is 0.3 to 0.5, and the logarithmic decrement of vibration of the second elastic body 34 is preferably greater than 0 and 0.1 or less. If the logarithmic decrement of the vibration of the first elastic body 33A is less than 0.3, the damping effect of the floor is too weak, and the damping effect of the vibration of the floor cannot be sufficiently obtained. Further, when the logarithmic decrement of the vibration of the first elastic body 33A exceeds 0.5, the damping of the vibration of the floor is accelerated, but the damping effect of the floor is too strong and the first elastic body 33A becomes too hard. The maximum amplitude DR may be reduced. Further, when the logarithmic decrement of the vibration of the second elastic body 34 exceeds 0.1, the second elastic body 34 exerts the damping effect of the floor at the same time as the first elastic body 33A. In addition, the floor damping effect generated by the second elastic body 34 may become too strong. Therefore, the elastic portion 31 may become too hard and the maximum amplitude DR may be reduced. If the logarithmic decrement of the vibration of the first elastic body 33A and the logarithmic decrement of the vibration of the second elastic body 34 are within the above ranges, the first elastic body 33A is formed by using a known material such as rubber, and the second elastic body 33A is formed. Even if the elastic body 34 is formed by using a known material such as a metal coil, when an impact is applied to the floor, it is possible to accelerate the contraction of the vibration generated on the floor while increasing the deformation of the floor. In the present specification, the logarithmic decrement rate of vibration is the ratio of adjacent amplitudes in a state where the first elastic body 33A or the second elastic body 34 is vibrated and then left in a state where no external force is applied. The natural logarithmic decreation (ratio of vibration peaks) is taken, and the larger the value of the logarithmic decrement of vibration, the higher the vibration suppression effect.

Further, the maximum displacement amount of the second elastic body 34 is preferably 20% or more higher than the allowable displacement amount (allowable displacement amount) of the first elastic body 33A. If the maximum displacement amount of the second elastic body 34 is higher than the allowable displacement amount of the first elastic body 33A by, for example, 20% or more, even if the first elastic body 33A is displaced to the allowable displacement amount, the second elastic body 34 Since the limit of the displacement amount has not been reached, the displacement amount of the elastic portion 31 can be easily adjusted to the displacement amount of the first elastic body 33A. Therefore, when an impact is applied to the floor, the displacement amount of the elastic portion 31 can be easily adjusted by the displacement amount of the first elastic body 33A, so that the displacement amount of the elastic portion 31 corresponds to the displacement amount of the first elastic body 33A. The maximum amplitude DR of the floor vibration, which will be described later, becomes higher.

Next, as shown in FIGS. 4 and 5, the female screw portion 32 includes an insertion portion 38 for fixing the lower end portion of the adjusting bolt 22, and a flange portion 39 extending from the side surface of the insertion portion 38. The lower end surface of the flange portion 39 is provided at the upper end of the elastic part 3 1, flange 39 is thus supported by the elastic part 3 1. The end of the flange portion 39 is fitted into the fitting portion 36 and is fixed by the first elastic body 33A.

Therefore, the elastic part 3 1, a combination of two kinds of the elastic body of the first elastic member 33A and the second elastic body 34, by incorporating the second elastic body 34 inside the first elastic member 33A, the impact on the floor when applied, the impact makes it possible to increase the amount of return with the floor can be returned quickly displacement of the floor caused by deformation, the rebound force and repulsion speed when the only the elastic part 3 1 increased to shocks Be done. Therefore, the amount of displacement in the opposite direction (DR in FIG. 6) caused by the repulsion to the deformation can be made larger than the amount of displacement of the floor caused by the impact (D1 in FIG. 6), and the vibration of the floor described later. The apparent half-cycle TR at the time of maximum amplitude DR can be reduced.

Here, the elasticity of the floor structure 10 has three elasticity values Y, a buffer effect value U, and a vibration damping time TVD, as defined in JIS A6519 “Steel floor base constituent material for gymnasium”. It is specified in the item. Then, the elasticity test method is as follows: Using the elasticity measuring device specified in JIS A6519 "8.4 Floor Elasticity Test", a weight of 5 kg is placed at a height of 0.8 m from the floor surface. It is freely dropped from the floor and collides with the floor surface via a rubber spring to give an impact to the floor. Then, when an impact is applied to the floor, vibration is generated on the floor, and the change over time in the displacement of the floor as shown in FIG. 6 is measured. As shown in FIG. 6, from the obtained floor displacement waveform, the maximum amplitude of the floor vibration (hereinafter referred to as "maximum amplitude") DR (unit: cm) and the apparent maximum amplitude of the floor vibration. Half cycle (hereinafter referred to as "apparent half cycle") TR (unit: seconds (sec)) and damping time required for floor vibration to decay to 0.2 mm (hereinafter referred to as "damping time") TVD (unit: seconds) is required. From these values, the floor repulsion effect value A (unit: cm2 / sec), the buffer effect value U, and the elasticity value Y can be obtained from the following equations (I) to (III). The repulsion effect value A generally represents the ratio of the sensation of rebound, and the buffer effect value U represents the ratio of the sensation of hardness. Further, UF is the deformation energy (unit: kgf · cm) of the floor until the deformation of the floor reaches the maximum, and corresponds to the energy for absorbing the impact applied to the floor surface. The value of UF is determined by the entire floor structure 10 including the support legs 11 and the floor material 12. For example, the spring constant of the elastic portion 31 constituting the support legs 11, the material of the floor material constituting the floor material 12, and the like. It is determined by the configuration and conditions of each member constituting the floor structure 10, such as the thickness and the spacing between the support legs 11.
A = DR x DR / TR ... (I)
U = UF-1.1 x DR x DR / TR ... (II)
Y = 1.3782-0.0016 × (U-17.25) 2-0.0028 × (A-24.28) 2 ... (III)

The relationship between the repulsion effect value A, the buffer effect value U, and the elasticity value Y is as shown in FIG. As shown in FIG. 7, in order to optimize the elasticity value Y, it is important to adjust the repulsion effect value A to the range of the more optimal region of the elasticity value Y. For this purpose, the maximum the amplitude D _R is larger, the half period T _R of the apparent said that it is necessary to reduce.

In the present embodiment, as described above, the support member 21 is formed by combining two types of elastic bodies, the first elastic body 33A and the second elastic body 34, so that an impact is applied to the floor and vibration is generated. At the same time, the repulsive force and repulsive speed of the elastic portion 31 against the impact increase with respect to the displacement of the floor caused by the impact. As a result, the maximum amplitude DR of the floor is high and the apparent half-cycle TR is small, and as will be described later, the maximum amplitude DR of the floor is within a predetermined range (0.30 to 0.70 cm) and is apparent. The half-cycle TR of is within a predetermined range (0.015 to 0.040 seconds).

In the present embodiment, the first elastic member 33A is inside is formed through the tubular, the maximum amplitude D _R and a half period of the apparent T _R is within a predetermined range, the floor structure 10 As long as the elasticity value Y can be improved (0.20 or more) and the buffer effect value U can be within a predetermined range (20 to 40), the configuration is not particularly limited, and other configurations, shapes, etc. can be used. May be good.

For example, as shown in FIG. 8, the first elastic body 33B does not include the extension portion 35 and the fitting portion 36, so that a part of the lower end surface of the flange portion 39 comes into contact with the upper portion of the first elastic body 33B. The flange portion 39 may be installed so that the first elastic body 33B is sandwiched between the floor slab 13 and the flange portion 39. In this case, the lower surface of the flange portion 39 and the upper surface of the first elastic body 33B are integrated with an adhesive or the like. Further, as shown in FIG. 9, the first elastic body 33C is not provided with only the extending portion 35, and the end portion of the flange portion 39 is fitted into the fitting portion 36 and remains fixed by the first elastic body 33C. , The lower end surfaces of the first elastic body 33C and the second elastic body 34 may be provided so as to be in contact with the floor slab 13. In this case, the upper portion of the second elastic body 34 and the lower portion of the flange portion 39 are fixed by adhesive, welding, or the like, or the end portion of the flange portion 39 is tightly fitted to the fitting portion 36.

Further, in the present embodiment, the second elastic body 34 is arranged along the inner peripheral wall surface of the cavity in the first elastic body 33A, but the present invention is not limited to this. For example, as shown in FIG. 10, the first elastic body 33D includes a fitting portion 36 for fixing the end portion of the flange portion 39 to the installation surface of the flange portion 39, and an accommodating portion 41A for accommodating the second elastic body 34 inside. It may be configured to have and. By arranging the second elastic body 34 in the accommodating portion 41A, the elastic portion 31 can stably and easily install the second elastic body 34 in the first elastic body 33D. Further, it is possible to prevent the second elastic body 34 from coming into contact with the insertion portion 38, and the flange portion 39 can be stably installed on the first elastic body 33D and the second elastic body 34.

Further, in the present embodiment, the second elastic body 34 is arranged on the inner peripheral side of the first elastic body 33A, but may be provided outside the second elastic body 34. For example, as shown in FIG. 11, the first elastic body 33E has an accommodating portion 41B that internally accommodates the lower end portion of the insertion portion 38, and an extending portion 42 formed on the outer bottom portion. In the first elastic body 33E, a metal washer 37 is provided on the extending portion 42, and the second elastic body 34 is installed on the washer 37. Further, the lower end portion of the second elastic body 34 is fixed by the locking portion 42a of the extending portion 42 so as not to deviate from the washer 37. Therefore, the elastic portion 31 can easily and stably install the second elastic body 34 on the first elastic body 33E, and the flange portion 39 is stable on the first elastic body 33E and the second elastic body 34. Can be installed.

Further, as shown in FIG. 3, the adjusting bolt 22 is made of a threaded member such as a metal bolt having male threads formed on the outer peripheral surfaces of both ends thereof, and the male threaded portion 22a at the lower end serves as a support member 21. It is screwed into the provided female threaded portion 32, and the male threaded portion 22b at the upper end is screwed into the female threaded portion 23a of the adjusting nut 23. The male threaded portion 22a at the lower end and the male threaded portion 22b at the upper end are reverse threads.

The adjusting nut 23 includes a female screw portion 23a and an annular flange portion 23b provided on the lower peripheral edge thereof, and is made of a metal member. The female screw portion 23a is formed in a cylindrical shape, and a female screw is formed inside the female screw portion 23a. The adjusting nut 23 is provided with a female threaded portion 23a screwed into the adjusting bolt 22.

Further, the adjusting bolt 22 is provided with a minus groove 22c on the upper end surface thereof, and the tip of a rotating tool such as a screwdriver is fitted and rotated to move the adjusting nut 23 up and down to adjust the screwing position of the adjusting nut 23. To do. As a result, the height position of the adjusting nut 23 can be adjusted, so that the height position of the floor base material 51 can be adjusted. The support leg 11 is assembled by screwing the male threaded portion 22b at the upper end of the adjusting bolt 22 with the female threaded portion 23a of the adjusting nut 23. In the adjusting nut 23, the female screw portion 23a is fitted into the insertion hole of the floor base material 51 of the floor material 12, and the annular flange portion 23b is adhered to the peripheral edge of the insertion hole, so that the floor base material 51 becomes the adjustment nut 23. Attached to. The height direction of the support leg 11 can be adjusted by changing the length of the adjustment bolt 22.

In the present embodiment, the adjusting bolt 22 is connected to the floor base material 51 via the adjusting nut 23. However, the adjusting bolt 22 is provided with a female screw portion in the insertion hole 24a of the floor base material 51 to provide an adjusting bolt. 22 may be directly connected to and fixed to the floor base material 51.

Further, the distance between the adjacent support legs 11 is arranged so that the influence of the elastic strain of the floor material 12 is minimized.

Further, as shown in FIGS. 1 and 2, the floor material 12 is provided on the support legs 11, includes a floor base material (base panel) 51 and a floor finishing material (flooring material) 52, and is provided from the support leg 11 side. The floor base material 51 and the floor finishing material 52 are laminated in this order toward the floor surface side. The floor material 12 is composed of the floor base material 51 and the floor finishing material 52, but a waste plate may be arranged between the floor base material 51 and the floor finishing material 52.

The floor base material 51 is provided on the support legs 11 and has a plurality of holes into which the upper ends of the adjusting bolts 22 are inserted. The floor base material 51 is fixed to the adjustment bolt 22 by inserting the upper end of the adjustment bolt 22 into the hole of the floor base material 51. The floor base material 51 is made of a wood-based material or a composite material thereof, and the material of the floor base material 51 includes particle board, fiber board, OSB (oriented strand board), MDF (wood fiber board), and the like. Fiberboard, plywood, etc. can be used.

Flooring 12, the weight of the flooring 12 per unit area is small, when the impact is applied to the floor, since the floor member 12 is easy to move largely vertically, is possible to increase the maximum amplitude D _R floors it can. As a method of reducing the weight of the floor material 12, it is conceivable to reduce the thickness of the floor material 12, but if the floor material 12 is too thin, the floor strength also decreases, so it is necessary to use a material having a higher strength. Become. As such a material, it is preferable to use a material in which particle boards, plywood, etc., which are thin but have higher strength, are vertically bonded together as the material of the floor material 12. Further, a plywood or a reinforcing sheet having high tensile strength may be arranged below the floor base material 51. As a result, the elasticity and strength can be increased while thinning the floor base material 51. As the reinforcing sheet, for example, a roving cloth made of high-strength fibers, a woven cloth, or the like can be used in layers. As the high-strength fiber, for example, glass fiber, polyester fiber, vinylon fiber, aramid fiber, carbon fiber and the like can be used.

The floor base material 51 has a flat plate shape, but from the viewpoint of using the floor base material 51 as the base plate of the floor material 12, the shape of the flat surface is not particularly limited as long as it is rectangular, and the installation area, It can be changed as appropriate according to the installation situation such as the installation location.

Since the floor base material 51 can be attached to and detached from the adjusting nut 23, it is preferable to fix it to the adjusting nut 23 by screwing. An underfloor space is formed between the floor material 12 and the floor slab 13, and equipment (not shown) such as telecommunications wiring and water supply / drainage pipes is provided in this underfloor space.

The floor finishing material 52 is laid on the upper surface of the floor base material 51. In the present embodiment, the floor finishing material 52 is provided on the floor base material 51 so that the longitudinal direction of the floor finishing material 52 is orthogonal to the longitudinal direction of the floor base material 51. Further, the floor finishing material 52 is arranged on the floor base material 51 so that the joints of the floor finishing material 52 do not overlap with the joints of the floor base material 51. Examples of the floor finishing material 52 include flooring materials, wooden floors, floor tiles, synthetic resin-based soft sheet finishing materials, cork materials, tatami mats, and the like. The floor finishing material 52 is fixed to the floor base material 51 with, for example, an adhesive or screws. The floor surface is finished by fixing the floor finishing material 52 on the floor base material 51.

In the present embodiment, the floor material 12 has a two-layer structure including the floor base material 51 and the floor finishing material 52, but the present invention is not limited to this, and the floor base material 51 and the floor finishing material are not limited thereto. A three-layer structure in which a waste plate is provided between the floor base material 51 and the floor base material 51 may be provided, and the waste plate may be laid on the upper surface of the floor base material 51. In this case, the waste plate is fixed to the floor base material 51 with, for example, an adhesive or a screw, and the floor finishing material 52 is fixed to the waste plate with, for example, an adhesive or a screw. The waste board is also called an underlay board or a waste board. Examples of the waste board include softwood or softwood plywood, plywood in which both softwood single board and softwood single board are used, fiberboard, oriented strand board (OSB), and particle board. Etc. are used. Examples of the fiberboard include a high density fiberboard (HDF) and a medium density fiberboard (MDF). Further, the waste plate may be composed of one plate material or two or more plate materials.

Next, an example of the construction method of the floor structure 10 will be described. The floor structure 10 is constructed by using the floor-standing method. When constructing the floor structure 10, first, the male threaded portion 22a at one end of the adjusting bolt 22 is screwed and attached to the female threaded portion 32 of the support member 21. Next, the male threaded portion 22b at the other end of the adjusting bolt 22 is screwed into the adjusting nut 23 attached to the floor base material 51 to assemble it into a table shape, and then the support member 21 side is turned down and the floor slab 13 is turned down. The floor base material 51 is laid out on the foundation surface of the above. As a result, the plurality of support legs 11 are erected on the foundation surface of the floor slab 13 at regular intervals.

Next, the height of each floor base material 51 is adjusted by inserting a screwdriver or the like into the minus groove 22c of the adjusting bolt 22 and turning the adjusting bolt 22 to raise and lower the adjusting nut 23. After adjusting the upper surface of the floor base material 51 to the same height, the floor finishing material 52 is placed on the plurality of floor base materials 51 and fixed to the floor base material 51 with nails or an adhesive.

Next, the floor finishing material 52 is attached and fixed on the floor base material 51 to form the floor material 12 and finish the floor surface. As a result, the floor structure 10 as shown in FIGS. 1 and 2 is constructed.

As described above, in the present embodiment, the floor structure 10 is configured to include the support legs 11 using the support member 21 and the floor material 12, so that an impact is applied to the floor and vibration is generated on the floor. and time, while increasing the maximum amplitude D _R of the waveform indicating the temporal change of bed deformation, by reducing the half period T _R of the apparent relative maximum amplitude D _R waveforms showing changes over time in the bed of deformation It is small shapes of the half period T _R Te. Floor structure 10 enhances the maximum amplitude D _R and rebound effect value A obtained from the half period T _R of the apparent, and increase the recovery effect of the floor surface. At the same time, the floor structure 10, to increase the maximum deformation energy U _F of the floor structure 10 up to the deformation of the floor that occurs when an impact is applied to the floor surface reaches the maximum, to increase the cushioning effect of the shock, strain floor It's easy. Thus, the floor structure 10 by repulsion effect value A and the maximum deformation energy U _F is configured so that each falls within a predetermined range, improve elasticity value Y of the floor (e.g., 0.20 or more) It is possible to maintain the cushioning effect value U of the floor within a predetermined range (for example, 17.25 to 40), and it is possible to have excellent elasticity. Hereinafter, a detailed description will be given.

Since the floor structure 10 includes the support legs 11 using the support member 21 and the floor material 12, the displacement of the floor caused by the impact applied to the floor is large, and the repulsive force and the repulsive speed against the impact are high. Become. Therefore, the floor structure 10 is specified in JIS A 6519 based on the test method specified in "8.4 Floor elasticity test" of JIS A 6519 "Steel floor base component for gymnasium". Using an elasticity measuring device, a 5 kg weight pan is freely dropped from a height of 0.8 m above the floor surface, and at a predetermined measurement point (points a to d) shown in FIG. 12 on the floor surface via a rubber spring. It collides with one of them to generate vibration on the floor surface. In this case, the maximum amplitude _{D R} of the vibration occurring in the bed, 0.30～0.70Cm becomes, the half period _{T R} of the apparent, the 0.015 to 0.040 seconds.

In the conventional floor structure, generally, the half period _{T R} of the apparent since it is in the range of 0.020 to 0.030 seconds, the maximum amplitude _{D R,} for example less and less 0.25 cm, 6 results in the maximum amplitude D _R so high relative to the half period T _R of the apparent waveform showing the time course of the deformation of the floor is not obtained, high rebound effect value a can not be obtained. In the present embodiment, the floor structure 10, the maximum amplitude D _R and a half period of the apparent T _R, by respectively having in the above range, since the restoring effect of the floor surface is increased, when the impact is applied to the floor surface Even if the floor is deformed and the floor surface is displaced, the displacement of the floor surface is likely to return. When the maximum amplitude D _R is below 0.30 cm, repulsion effect value A does not become sufficiently high, the energy required when the floor surface displaced impact is applied to the floor surface is restored is reduced. Further, the maximum amplitude D _R is more than 0.70 cm, repulsion effect value A is too high, there is a possibility to reduce the elasticity value Y. Further, T _R, if the above-mentioned range, without reducing the repulsive effect value A, easily adjusted within a predetermined range. In the present embodiment, the floor structure 10, rather than the conventional floor structure, for example, while increasing the maximum amplitude D _R of the waveform showing the time course of the deformation of the floor shown in Figure 6, small half period T _R of the apparent it is possible to, can be a waveform indicating a temporal change of bed variations with respect to the maximum amplitude D _R in a small shape of a half period T _R.

Further, in the present embodiment, the waveform showing the time change of the deformation of the floor shown in FIG. 6, the ratio of the maximum amplitude D half period of apparent at the time of _R T _R with respect to the maximum amplitude D _R a (D R _{/ T R)} , 12 to 20 is preferable. With the D R _/ T _R the above range, the waveform indicating the temporal change of bed deformation becomes smaller shape of a half period T _R for a greater maximum amplitude D _R, a large restoring effect of the floor, The displacement of the floor surface is easy to return.

Moreover, the floor structure 10, the maximum deformation energy _{U F} of the floor structure 10 up to the deformation of the floor reaches the maximum, and has a range of 25.00 to 66.70. When an impact is applied to the floor surface, distorted floor store absorbs energy across the floor structure 10, but conventional floor structure, generally, the maximum deformation energy U _F is 25.0 or less, the floor When an impact is applied to the surface and the floor surface is displaced, the floor surface is not displaced so much, and the entire floor structure cannot absorb and store so much energy. In the present embodiment, the floor structure 10 by having a maximum deformation energy U _F in the above-mentioned range, on the floor can be increased cushioning effect of the impact when a shock is applied, bed can be easily distorted. When the maximum deformation energy U _F is less than 25.00, it may be difficult to adjust the buffer effect value U to 15 or more, particularly 17.25 or more. Further, when the maximum deformation energy U _F exceeds 66.70, particularly 66.708, it may be difficult to adjust the buffer effect value U to 40 or less.

Furthermore, the floor structure 10, the maximum amplitude _{D R,} and the maximum amplitude _D is expressed from the half period _{T R} of the apparent at the time of _R, repulsion effect of the floor structure values A: the _{D R} × _D R / _{T R,} 4 It has a range of .0 to 24.28, preferably 4.0 to 12.00. As described above, this repulsion effect value A represents a bounce sensory scale. When the repulsion effect value A is within the above range, the floor structure has a good feeling of rebounding from the floor surface and a good usability. On the other hand, if the repulsion effect value A exceeds 24.28, the elasticity value Y may be lowered. Further, when the repulsion effect value A is less than 4.0, it is difficult to make the elasticity value Y 0.2 or more. The maximum value of the repulsion effect value A is about 12.00 for the material of the floor material 12 that can be used at present, but does not reach 24.28, but it depends on the material of the floor material 12 that can be used in the future. , The maximum value of the repulsion effect value A can be improved to 24.28.

The maximum deformation energy _{U F} and repulsion effect value A, above-mentioned formula (II), as shown in (III), buffering effect value U _is represented by U F -1.1 × A, elasticity value Y, ^{_{1.3782-0.0016 × (U F -1.1 × A}} -17.25) is expressed by ^{2 -0.0028 × (A-24.28)} 2. Incidentally, U _F, as described above, deformation of the floor is the floor deformation energy to peak, construction of respective members constituting the floor structure 10, is determined by such conditions. The floor structure 10 can have _{the buffer effect value U of the floor structure 10 represented by the maximum deformation energy U F} and the repulsion effect value A in the range of 17.25 to 40, and has an elasticity value Y. , 0.20 to 1.3782. As a measurement point, as shown in FIG. 12, the central portion of the floor base material 51 is set as a point a, the support leg 11 is set as a point b, and the joint portion on the longitudinal side of the floor base material 51 is set as a point c4. Let point d be on the intersection of the two floor base materials 51.

In the conventional method, of the elasticity of the floor, the elasticity value Y is not improved even if the buffer effect value U is improved. Therefore, for example, the elasticity is limited to a biased range as in the region α shown in FIG. It can be said that only the floor structure that exerts its properties has been obtained. On the other hand, in the present embodiment, the floor structure 10 has a waveform indicating the displacement of the floor as compared with the conventional floor structure when an impact is applied to the floor and vibration is generated by the above-described configuration. maximum amplitude _{D R} is high, and the half period _{T R} of the apparent decreases. Therefore, each of the maximum amplitude D _R and a half period T _R of the apparent floor becomes within a predetermined range as described above, repulsion effect value A is within a predetermined range as described above. Moreover, the floor structure 10, the maximum deformation energy U _F also falls within a predetermined range as described above. As a result, the floor structure 10 can improve the elasticity value Y of the floor, bring the elasticity value Y closer to the optimum value, and maintain the buffer effect value U within a predetermined range. For example, elasticity can be exhibited in the vicinity of the region β shown in FIG. Therefore, the floor structure 10 can improve the elasticity value Y of the floor (for example, 0.20 or more) when an impact is applied to the floor and vibration is generated, and the cushioning effect value U of the floor is set to a predetermined value. It can be within the range (eg, 17.25-40).

Further, the elasticity value Y or the buffer effect value U may be an average value of values measured at a plurality of positions on the floor surface. In the present embodiment, the average value of the values measured at each measurement point (points a to d) on the floor surface satisfies the above equations (1) and (2). As a result, the elasticity value Y of the floor can be improved more stably over the entire floor, and the cushioning effect value U of the floor can be kept within a predetermined range, so that the elasticity is stable and excellent. It can be a floor structure having.

Further, the difference between the maximum value and the minimum value of the elasticity value Y of the floor measured at each measurement point (points a to d) is 0. It is preferably 20 or less. By reducing the difference between the maximum value and the minimum value of the elasticity value Y of the floor, it is possible to improve the elasticity value Y of the floor more stably on the entire floor surface, so that the elasticity is further improved. It can have a floor structure.

Further, the variation with respect to the average value of the cushioning effect value U of the floor measured at each measurement point (points a to d) is preferably, for example, 15% or less, and more preferably 12% or less. By reducing the variation of the buffer effect value U over the entire floor surface with respect to the average value, the buffer effect value U over the entire floor surface can be made more stable, so that the floor structure has even better elasticity. Can be done.

Further, the maximum displacement σ of the floor surface when vibration is generated on the floor surface is preferably 0.25 to 0.35 cm. The higher the maximum displacement sigma, the maximum amplitude D _R is increased in order to maintain a cushioning effect value U while improving the elasticity value Y of the floor structure 10, correspondingly, further half period T _R of the apparent It needs to be small. Therefore, the maximum displacement sigma, in consideration of the balance of the mutual maximum amplitude D _R and a half period of the apparent T _R, Within the above range, the repulsion effect value A is easily adjusted in the above range, the floor The elasticity value Y can be easily improved.

The maximum load Pmax of the floor material 12 when vibration is generated on the floor surface may be, for example, 180 to 200 kg. The higher the maximum load Pmax, the greater the load applied to the floor material 12. Therefore, if the maximum load Pmax is within the upper range, the load applied to the floor material 12 can be suppressed, so that cracks or damage to the floor material 12 can be suppressed.

The floor decay time _TVD is preferably 0.45 seconds or less, more preferably 0.30 seconds or less. The damping time _TVD must be 0.45 seconds or less as specified in JIS A 6519 “Steel floor base component for gymnasium”, the damping time _TVD is short, and the vibration of the floor material 12 If it decays in a short time, it will become a more stable floor.

As described above, according to the floor structure 10, when an impact is applied to the floor and vibration is generated, the elasticity value Y of the floor can be improved (for example, 0.20 or more), and the cushioning effect of the floor can be improved. Since the value U can be within a predetermined range (for example, 17.25 to 40), it can have excellent elasticity and can provide a highly reliable floor structure. Further, the floor structure 10 can be used in an existing building or the like, and can be applied to the repair of the floor structure or the like. Therefore, the floor structure 10 has elasticity while reducing the cost when repairing the floor base material. Can be improved.

As described above, the floor structure according to the above embodiment can be suitably used for the floor structure of a facility that uses a floor-standing double floor such as an indoor sports facility where exercises such as gymnasiums and multipurpose halls, exhibitions and concerts are held. it can.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to the following Examples.

<Preparation of test piece>
[Examples 1 and 2]
A plurality of support members 21 are arranged on the floor base 13 at predetermined intervals, and after mounting the adjustment bolts 22 on the support members 21, the adjustment nuts 23 previously attached to the floor base material 51 at the upper ends of the adjustment bolts 22. The support leg 11 was manufactured. Then, the floor finishing material 52 was arranged on the floor base material 51 to prepare a test body having a floor structure as shown in FIG. The test bodies thus obtained were designated as test bodies 1 and 2.
[Comparative Example 1]
Except that a cushion rubber is used instead of the support member 21 of the first embodiment and the plate material 12 has a three-layer structure in which a waste plate is provided between the floor base material 51 and the floor finishing material 52, the plate material 12 is the same as that of the first embodiment. A test piece was prepared in the same manner. The test body thus obtained was designated as test body 3.
[Comparative Example 2]
A test body was produced in the same manner as in Example 1 except that a cushion rubber was used instead of the support member 21 of Example 1. The test body thus obtained was designated as test body 4.

<Evaluation>
As shown in FIG. 12, the test bodies 1 to 2 obtained as described above in accordance with the provisions of "8.4 Floor Elasticity Test" of JIS A 6519 "Steel Floor Base Component for Gymnasium". Using the elasticity measuring device specified in JIS A 6519, a 5 kg weight pan was freely dropped from a height of 0.8 m above the floor surface at four points a to d on the floor surface of 4. A heavy pan collided with the floor surface via a rubber spring to forcibly generate vibration on the floor. Then, the radial change of the floor displacement as shown in FIG. 6 is measured, and from the obtained floor displacement waveforms of the test specimens 1 to 4, the maximum floor deformation energy U until the floor deformation reaches the maximum. _F (kgf · cm), the maximum amplitude _D R of the vibration of the floor (cm), a half cycle of apparent at the maximum amplitude of vibration of the floor _{T R} (s), required for the vibration of the floor is attenuated to 0.2mm The decay time Tvd (seconds) was measured. From these measured values, the repulsion effect value A, the buffer effect value U, and the elasticity value Y of the floor were determined based on the following formulas (I) to (III), respectively. Incidentally, _{U F} is the maximum deformation energy of the floor up to the deformation of the floor reaches the maximum (kgf · cm). Further, as shown in FIG. 12, the measurement points are as follows: the central portion of the floor base material 51 is set as a point a, the support leg 11 is set as a point b, and the joint portion on the longitudinal side of the floor base material 51 is set as a point c4. The point d was defined as the intersection of the two floor base materials 51. The measurement results of Examples 1 and 2 and Comparative Examples 1 and 2 are shown in Tables 1 to 4, and the measurement results of the elasticity value Y and the buffer effect value U of Examples 1 and 2 and Comparative Examples 1 and 2 are shown in FIGS. 13 and 14. Shown in.
_{A = D R × D R /} T R ··· (I)
_{U = U F -1.1 × D R} × D R / T R ··· (II)
^{Y = 1.3782-0.0016 × (U-17.25} ) 2 -0.0028 × (A-24.28) 2 ··· (III)

From Tables 1 and 2, in Examples 1 and 2, the elasticity value Y at each point a to d of the floor was in the range of 0.20 to 0.49, and all were 0.2 or more. .. Further, the average value of the elasticity value Y of each point a to d exceeds 0.2, and in the first embodiment, the variation of the elasticity value Y of each point a to d is 0.1 or less. In Example 2, the variation of the elasticity value Y at each point a to d was 0.18 or less. The buffer effect values U at each point a to d of the floor are all in the range of 24 to 30, the variation of these values is small, and the overall average value of the buffer effect value U is in the range of 20 to 30. Met. On the other hand, from Tables 3 and 4, in Comparative Examples 1 and 2, the elasticity value Y is about 0.196 at the maximum, and the average value of the elasticity values Y at each point a to d on the floor is 0.12 or less. The overall average value of the buffer effect value U was in the range of 19 to 25. Therefore, the maximum amplitude D _R, by an apparent half-period T _R as each falls within a predetermined range, the elasticity value Y of the floor can be made 0.20 or more, buffering effect value of the floor It was confirmed that U could be in the range of 20-30.

Generally, when the maximum value of the elasticity value Y is within the range of 0.2 to 1.378, it is easy to exercise, so it can be said that the floor surface is suitable for exercise. Further, if the buffer effect value U is generally in the range of 20 to 30, the possibility of failure is lower, so that the floor is considered to be a safer floor. Therefore, in the floor structure of the present invention, it can be said that the elasticity value Y of the floor is 0.20 or more and the cushioning effect value U of the floor is in the range of 20 to 30, so that it is possible to exercise comfortably and further. It can be said that the floor is highly safe.

10 Floor-standing floor structure (floor structure)
11 Support legs 12 Floor material 13 Floor slab (floor base)
21 Support member 22 Adjustment bolt (support bolt)
22a, 22b Male threaded part 22c Minus groove 23 Adjusting nut 23a, 32 Female threaded part 23b Circular flange part 3 1 Elastic part 33A to 33D 1st elastic body 34 2nd elastic body 35, 42 Extension part 36 Fitting part 37 Washer 38 Insertion part 39 Flange part 41A, 41B Accommodating part 42a Locking part 51 Floor base material (base panel)
52 Floor finishing material (flooring material)

Claims (9)

A support member used in a floor-standing floor structure including a plurality of support legs arranged on a floor base and a floor material laid on the support legs.
The support member
A tubular first elastic body arranged between a support bolt for supporting the floor material and the floor base, and a second elastic body provided in parallel inside or outside the first elastic body. Elastic part to have and
A female screw is formed to be screwed with the lower end of the support bolt, and extends from the side surface of the tubular insertion portion to which the support bolt is fixed and the insertion portion located closer to the floor base than the female screw. A female screw portion having a flange portion provided in contact with the elastic portion and integrally formed with the insertion portion, and a female screw portion.
Equipped with,
The lower end surface of the flange portion is installed on the installation surface of the first elastic body and the second elastic body.
The logarithmic decrement of the vibration of the first elastic body is 0.3 to 0.5, and the logarithmic decrement of the vibration of the second elastic body is larger than 0 and 0.1 or less. , Support member. The support member according to claim 1, wherein the insertion portion has an inner diameter larger than the position where the female screw is formed at a position where the flange portion is connected. The first elastic body is provided with an fitting portion into which the end portion of the flange portion is fitted around an installation surface in contact with the lower end surface of the flange portion.
The support member according to claim 1 or 2, wherein the end portion of the flange portion is fixed to the first elastic body in a state of being fitted into the fitting portion. The support member according to any one of claims 1 to 3, wherein the first elastic body is formed in a tapered shape so as to expand toward the floor base side from the middle of the outer circumference thereof. The first elastic body further comprises an extension formed on the inner or outer bottom.
The support member according to any one of claims 1 to 4, wherein the second elastic body is arranged on the extension portion. The support member according to any one of claims 1 to 5, wherein the first elastic body has an accommodating portion for accommodating the second elastic body inside. The support member according to any one of claims 1 to 6, wherein the spring constant of the first elastic body is 1.0 to 1.0, and the spring constant of the second elastic body is 0.50 to 1.5. .. The support member according to any one of claims 1 to 7 , which is arranged on the floor base, and the support member.
Support bolts erected on the support member and
Support legs equipped with. The support leg according to claim 8 and
The floor material laid on the support legs and
Floor-standing floor structure with.

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